Excavator-bucket.



RB.. SHNABLE.

EXGAVATOR BUCKET.

APPLICATION PILBD APR..29, 1909.

merma Feb.20,1912i '2 SHEETS-SHEET 1.'

E. R. SHNABLE.

BXAVATOR BUCKET.

APPLICATION FILED APR. 29, 1909.

Patented Feb. 1912.

om ba m M an f ,UNITED sr-ATasarENT Ncarlton. I

EMILE SHNABLE. CHICAGO, ILLINOIS.' ASSIGNOR TO SHNABLE 8c QUINN, OF

i CHICAGO, ILLINOIS, A COPABTNERSHIP.

EXcAvA'roR-BUCKET.

Patent-ea Feb. eo, 1912.1v

Appacau'oa ined April a9. i909. senza No. 492.876.

1,018,275. n Specification of Letters Patent.

lfigure 1 is a side elevational view of the bucket. showing the salue in loading.;- posi. tion. Fig. 2 is a similar view, showing the bucket in dumping or discharging` position.`

To all whom, 'it mayv concern:

Be vit knownthat I, Enna; ltsuxannn, a `citizenof the-United States, and a residentbf Chicago, vin the ',count'yot (Took and qState oflllinois, have invented certain new Fifi. il is a central vertical longitudinal sec and useful Iniprovements in` Excavatortion of the bucket as it appears when loaded i Buckets, of which the following is aspccitiand ready to be transferred to its point of cation. l y i A delivery, Fig. t is a top pian view, partly This invention yrelates toexcavating broken away and in horizontal section. Fig. buckets of 4that type which have an open 5 is a vertical transverse section on the lineY `65 frontwith a forward cutting edge, and are 5--5 of Fig.' 3. y i manipulated through Athe agency 'ofpulling Describing` first the body member o1 arid hoisting cables. n scoop, this comprises essentially a metal The chiet` `object had in view in the destri'lcture having;` parallel side walls 6 and? l "veloprnent of my invention has been to proand a slightly curved transverse bottom wall 70 duce a bucket requiring a minimum number S, which latter is `termed `with a front bevelof bucket-operating accessories, vsince itis ed cutting edge fl.. rThis structure is preti manifestthat the` fcweriand simpler these erably variously stitiened and r`einf nced,-Y accessories, the less the liability to derangethe forward portion thereof, which is sub ment4 of the parts in operation and the jected to` the greatest strain, being embraced 75 greater the speed with whichthe lnicketcan by a reinforcing plate 10 strongly riveted be operated, especially when employing` the to the side and bottoni walls thereo'lf, and "usuall der-rick or boom. having;` the forward edge thereof merged `In.'carrying out my invention I employ into the/cuttingr edge ofthe body. The side` two main structural parts, one comprising a walls t3 and 7 are stitened longitudinally by 80 body or scoop, which formed with solid .reinforcing strips Vil.` and 12 riveted to the .side and bottoni walls",I open at both ends, -inner sides of the upper margins thereof; y and with the forward'edge oit. the bottom while the rear vertical edges ot the side wall beveled or tapered to a cutting-edge,' walls are reinforced b v marginal strips 13, and vthe other.comprising a closure 4for the and 14. 'lhe bottom wall ot the bucket body 85 rear end of the ,body'inember and being is provided preferably with a series of lonv'orn'ied rigid with the hinged bail by which g-ituldinal wear strips or runners l5 of inthe bucket is elevated. The closure referred creas-sal thielvjness at their rear ends; and it: to doesnotdepend upon any` lock `or catch will be observed by'referencel to Figs. 2 and.l to maintain it closed duringi'the fillingJ oper- Il that the bottom wall Fl ot the bucket ex- 9 0` Isis:

i'by *thel v the ten't lon' on the d-ra'tt` cable `and lpermithv ation, but is maintained closed by the draft or., pull which is made eti'ective through the, agency of lsuitable link and lever connections between the. draft yoke arid thc hoistingbail; and the opening of the rear end of the bucket? when elevated to permit the discharge of thjeload is automatically effected avityoiitho load upon releasing tends rearwardly slightlybeyond the roar edges o-l the side walls ti and 7. Also riveted to the outer sides ol the side walls, preferablyv to the sides of" thorreintorc plate 10, are a pair of reinforcingand spa ing plates iti, which latter, `with the. walls to' which they are secured. areapcrtured to lfornibearings tor pivot1-pins 1T by which the. `body is suspended. in the vertical :arms

tingt'he loadedbucket to hang wlu'illyliroin ot a rectangular hoisting' bail 1S. The side 100 the hoisting' cable;-so thatwbut `two ,cables walls aro strongly connected between the y (the draft cable and a hoisting cable) `are upper portions of their torvard ends by a reqi'iied'to et'lfectnot only the lillingol." the horizontal channel bar 19 riveted atits'eiids bucket, but. also thev4 release of` the closure. to the upper edges of said side walls. Re-

andthe discharge of the load. intorcing plates 20, best shown in Fig. 3, are order "that,th'eprineiple, ofnlyinvens riveted to the inner 'faces oi the side -walls tionvmma'ly triade 4entirely clear, l .have o and T at, the `forward ends of the latter g' illu ratedfin "theaccompanying; drawings `and these .reinforcing plates, together with on p actie" l i `in`which the saine may i the ,side .wallsot` thelnicket-body" and "exi findexpression,and referring theretof l tornai reinforcing Vplate.t0,'are formedfwith 110 oblique slots v21 engaged by pivot-pins 22, on which arepivoted the inner ends of the longitudinal arms of the draft-yoke 23, thereby giving such yoke a lost motion connection with the bucket.

24 designates the main member or door of the closure 'which coperates with the rearopen end of the bucket-body. This member i l is a metal plate of sufficient area to cover the rear open end of the bucket-body and so shaped in vertical cross-section as to conform to and .substantially fit the rear upright margins of the side walls of the body. The

door 24 is reinforced and strengthened by longitudinal and transverse ybint/iing-strips, the lower longitudinal binding-strip 25 being rivetedexternally to the lower edge portion ofthe door and; with the latter, being trimmed to a substantial fit upon the rearwardly projecting portion of the bottom wall 8 of the b11cket-body. The chief purpose 'inhaving the lower edge ofthe door rest upon the 'rea-r edge of the bottom wall of the body is to prevent injury to the lower edge of the door through contact with stones andlike obstructions. The upper longitudinal binding-strip 26 (which virtually constitutes van inward extension of the-"upper edge of the door-plate proper) and the transverse .binding strips 27 and 28 are riveted to a pair of suit-ably trussed or braced vside-frames desi ated as an entirety by 29 and 30,

. whic latter, at their forward ends, areconnecteijl tio the vertical arms of they hoisting bail through the agency of connecting plates or cleats 31 and 32. The vertical arms of the 4 hoisting bail 18 below the pivots 17 are bent in al forward direction, forming short lever arms 18, the lower ends of which are connected by links 33 with the pivot-pins 22 of the Idraft-yoke 23; and the relationof the parts is such that, when the door is in closed position and the draftoke '23 is under tension, the pivot-pins 22 l1e just at the advance ends of the slots 21. Hence, the pull of the draft-yoke is exerted directly upon the forward end of the bucket-body at a point causing the forward edge or mouth thereof to tip' downwardly as shown in Fig. 1, and Yassume a position favorable to the scooping up of the load, while at the sam'e time, through the connection of the links' 33 to the lever arms 18, which are rigid with the bail arms 18, the door is held securely in its closed position, since it cannot open without at the same time drawing the links 33 rearwardly, as illustrated by Fig. 2.

34 designates the hoisting cable connected through a suitable /eye-bolt 35`with the' lifting bail 18 centrally thereof, and 36 designatesl-the draft-cable connected through a similar eye-bolt 37 with and centrally of the draft-yoke 23.` The lifting bail 18 is preferably pivoted in the sides of the bucketbody at points slightly in advance of the operation the door 24 is held in place against the thrust ofthe load through the links33 connected to the draft-yoke 23, as above explained. The bucket is then raised by the hoisting cable 34 and swungto a position above the point of discharge, during-,which operation suilicient tension is maintained on the draft-cable 36 to prevent premature dumping of the load. As soon as thev bucket has been swung directlyl` over the point of delivery, the draft-cable 36 is'slackened, and, the lcenter of gravity of the loaded bucket beingsconsiderably in rear of the pivot ,the body of the bucket instantly swings to the dumping or discharging position shown in Fig. 2, thus uncovering its rear' end and ermitting the load to -fall therethrough;` heA empty bucket is ythen swung yback aiffd` lowered to excavating ositilon, whereupn, by4 slackening the hoistmg cable 34 and piillin'.

-on the draft-cable 36, the above-describe operations of loading,- transferring and delivery are repeated; Preferably the parts are so constructed thatvas -soon -as the bucket hasl discharged its i load the bucket-body swings back automatically to closed position because the center of gravity of the combined bucket-body and f draft. appliance is desirably in advance. of

the pi'yotal support of the body. Under thesegcircumstances the operator need pay noattent-ion to theclosing of the bucket. In other words, no ypull on thedra-ft appliance other than that of its own weightis required to swing the bucket-body closed. When the body` is loaded, however, a substantial pull on the cable is necessary to revent'it fromopening and discharging its oad.-

It .will be observed that the entire lmvap nipulation andj control of the bucket is effected solely through the hoisting and draft cables, and without requiring the use of-any locks and lock-trippin or releasing devicesfor maintaining: t ,eiucket closed during l loading and'eifectingits dumping or dis-- charge.

Whereas I haveherein indicated-oneparticular and preferredembodimentx of this. in-

vention, I wishV ltof have it understood that vthe inventionisnsusceptible of a Av'arietyof embodiments, Vand ,the mechanical elements and features. of.the,bucket herein 4vset forth',y 130-y may be modified Within ma@ limits. wahi out departure from the heart and essence of 'this invention and without the sacrifice` of any substantial benefits and advantages. V I claim:

l. In 'an excavator bucket, the combina- I "tion witha bucket-body having a forward `cutting -edge 'and an open rear end, of a closure forsald rear end mounted on said bucket-body, a draft-member connected -to' the forward portion of said bucket-body above the center of gravity'of the latter,

and, means connecting said draft-member and closure to hold the lat-ter in closed position under pull on said draft member, sub- V'stantially as described.

A,body is pivoted, a closure on said supporting member for the rear end of said bucketcri body, a draft member connected with said `suppciting-member and said bucket-body above the center of gravity of the lat-ter and adapted under vpull on said draft member to hold theloaded bucket-body `in closed relation to said closure and permittino' the bucket-body toturn on its pivotsto dump its contents upon releasing the pull onthe draft member, substantially as described.

3. Inan excavator bucket., the combinationof a bucket-body having a forward cutting edge andan open rear end, a bucketsupporting member to which the sides of saidbucket-body are pivoted, a closure for the rear end of said bucket-body rigidly afxed on said s pporting member, and a draft member co nected with said supportring'memb'er and said-bucket-body above the center of l' gravity -0f the latter, said 'draft .member under pull thereon acting to lild the loaded bucket-body in closed relation to said closure and permitting` the bucket-body lto turn on its pivots to dump its contents upon releasing the pull `on the draft. member, substantially as described.

4. In an excavating bucket, the combination with a'bucket-body having a forward cutting edge and -an open rear end, of aV hoisting bail pivoted to the sides of said bucket-body, a door for closing the rear end of'said bucket-body rigid with said hoisting bail, a draft-yoke having a lost-motion connection -to the forward end of vsaid bucketbody, and connections between the arms of said draft-yoke and the armsof said hoisting bail below the pivots of the latter, substantially as described.

5.1m an excavating bucket, the combina'- tion with a bucket-body having a forward cutting edge and an open rear end, `of a hoisting bail,pivoted to the sides of said bucket-body and `having rigid depending ex` tensions below said pivots, a door for closing the r'ear end .of said bucket-body rigid with said hoisting bail, a draft-yoke having a lost-motion connection tothe forward end of said bucket-body, and links pivoted to and connecting the arms of said draft-yoke and the depending extensions of said hoisting bail, substantially as described.

6. In an excavating bucket, the combination with a bucket-body having a forward cutting edge, an open rear end, `and side walls slotted at. their forward ends, of a yhoisting bail pivoted to the sides of said bucket-body forwardly of the center of gravity of the latter and having rigid depending extensions below said pivots, a door for closing the rear end of said bucket-body rigid with said hoisting bail, a draft-.yoke

pivotally mounted in the slots of said bucketbody, and links connecting the arms of said draft-yoke and the depending extensions of said hoisting bail, substantially as described.`

7. In an excavating bucket, the combination with a bucket-body having side walls, and a bottom wall formed with a forward cutting edge and at its rear end extended beyond. the rear ends of said side walls, of 'a closure comprising a door mo-unted to swing between openr and closed positions relatively to the rear end of said bucket, and when in closed position overlying the rear ends of said side walls and at its lower edge resting upon .the rear extension of said bottom wall of the bucket body forwardly 4of the center of gravit-y of the latter and having rigid de pending extensions below said pivots-'a door for closing the rear end of said'bucket body rigid with said hoisting bail, a draft yoke,` and links pivptally connected to the depending ends of said hoisting bail and tothe invner ends of said draft yoke, the pivot pins connecting such links with said draft yoke being extended through slots and being disposed above the center of gravity of the bucket when the rear door is in closed position, substantially as described.

9. In an excavating bucket, the'combination of a bucket-body having a vforward cut- -ting edge and an open rear end and provided on the under surface of its bottom wall with longitudinally -disposed runners A extending beyond ther rear end of the bucket-bottom, a

closure for said rear end mounted on said bucket-body, the projecting ends of said runrners acting as a stop fol-said closure, a draft member connected to' the forward portion of increasing thickness from their forward to their rear ends, such runners extending be-` said bucket-body above the center of gravity of thelatter, and connecting means between said draft member and closure to hold the latter in closed position under pull on said draft member, substantially as described.

10. l{In an excavating bucket, the combination of a bucket-body having a forward cutting edge and an open rear end and provided on the 'under surface of its bottom Wall With a series of longitudnally-disposcd runners of yond the rear end of the bucket, a closure for said rear end mountedv on said bucket-body, the extending ends of said runners acting as stop for said rear closure, a draft member connected to the forward portion of said bucket-body above the center of. gravity of the latter, and means connectingsaid draft member and closure operating to hold the latter in closed position under pull on said draft member, substantially as described. ,A Vv.EMILE R. SHNABLE.

Witnesses: l

SAMUEL N. POND,

MATTIE B. BLISS. 

